371 Answered Questions for the topic physics B

Physics B Physics Physics C

03/25/21

Ballistic Pendulum Problem
My teacher doesn't teach us how to do our homework before we do it so I rely on KhanAcademy for the most part but this one's a bit tough.A dart with mass md is launched toward a block of... more
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Physics B Physics

03/22/21

A U-tube has dissimilar arms, one having twice the diameter of the other. It contains

A U-tube has dissimilar arms, one having twice the diameter of the other. It contains an incompressible fluid and is fitted with a sliding piston in each arm, with each piston in contact with the... more
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03/22/21

please help me with my physics homework
A spherical object (with non-uniform density) of mass 16 kg and radius 0.14 m rolls along a horizontal surface at a constant linear speed without slipping. The moment of inertia of the object about... more
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03/22/21

ahh i need help with my physics homework and its due in 3 days
A uniform disk with a mass of 180 kg and a radius of 1.4 m rotates initially with an angular speed of 1150 rev/min. A constant tangential force is applied at a radial distance of 0.8 m. a) How much... more
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03/20/21

PLEASE I NEED HELP WITH PHYSICS, IVE BEEN TRYING ON THIS QUESTION FOR DAYS
A long, uniform 5 kg rod of length 1.5 m is supported at the left end by a horizontal axis into the page and perpendicular to the rod, as shown. The right end is connected to the ceiling by a thin... more
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Physics B

03/05/21

I dont get this
Rain is falling vertically downward, and you are running for shelter. To keep driest, should you hold your umbrella vertically, forwardor tilted backward? Use the concepts of relative motion to... more
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03/03/21

What kinetic energy, 𝐸k , must the electrons have in order to resolve a protein molecule
To resolve an object in an electron microscope, the wavelength of the electrons must be close to the diameter of the object. What kinetic energy ,𝐸k, must the electrons have in order to resolve a... more
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Physics B Physics

03/01/21

A 1.2 kg block is placed on a spring with a spring constant of 665 N/m. What would the period of oscillation of this system be? 0.0425 s 0.0425 s 0.267 s 0.267 s 798 s 798 s 554 s 554 s
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Physics B Physics Physics C

02/27/21

A point charge of -3.0𝞵C is placed at the origin of coordinates. Find the electric field at the point x=5.0m on the x-axis.
A point charge of -3.0𝞵C is placed at the origin of coordinates. Find the electric field at the point x=5.0m on the x-axis.
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02/22/21

Pendulum Physics

assuming the weight part of the pendulum has potential energy at the top and kinetic at the bottoma teacher with a mass of 90kg is swinging, he's acting as a pendulum, he is 2.5meters up a) what is... more
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02/19/21

Can someone help me with this Physics problem?
A large insulating sphere of radius a carries a total positive charge Q with a uniform volume charge density. A very thin tunnel is drilled through a diameter of the sphere and two small spheres... more
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02/17/21

physics question. please help!

An unstable nucleus of mass 1.7 ✕ 10−26 kg, initially at rest at the origin of a coordinate system, disintegrates into three particles. One particle, having a mass of m1 = 1.8 ✕ 10−27 kg, moves in... more
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02/16/21

A block with mass m1 = 0.450 kg is released from rest on a frictionless track at a distance h1 = 2.85 m above the top of a table.
A block with mass m1 = 0.450 kg is released from rest on a frictionless track at a distance h1 = 2.85 m above the top of a table. It then collides elastically with an object having... more
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02/16/21

An unstable nucleus of mass 1.7 ✕ 10−26 kg, initially at rest at the origin of a coordinate system, disintegrates into three particles.

An unstable nucleus of mass 1.7 ✕ 10−26 kg, initially at rest at the origin of a coordinate system, disintegrates into three particles. One particle, having a mass of m1 = 1.8 ✕ 10−27 kg, moves in... more
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02/15/21

Energy and work problem
A 40 kg body starting from rest falls through a vertical distance of 0.25m to the ground, using energy methods,a) determine its kinetic energy just before it hits the ground,b) determine its... more
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Physics B Physics Physics C

02/10/21

UCM physics helpp plz
1. A runner completes 8 laps around a circular track in 480 s.a. What is the period?b. What is the frequency?2. A pendulum completes one cycle in 0.2 s.a. What is the frequency?b. How much time... more
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Physics B Science Physics Sat

02/10/21

PHYSICS LEVER/IMA
Create a class 1 lever with the fulcrum at 50cm mark, have the weight at 100cm mark, and the effort force at 0 cm. 4a)What is the mechanical advantage of the lever4b)move the fulcrum to 60cm what... more
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Physics B Physics Physics C

02/09/21

Please Help!!! A spring force is given by the formula F=2x-15x^2, where F is in N and x is in m. What is the change in potential energy wen the spring is stretched 1m from it's equilibrium position.
A spring force is given by the formula F=2x-15x2, where F is in N and x is in m. What is the change in potential energy wen the spring is stretched 1m from it's equilibrium position.
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Physics B

02/07/21

need help with this physic
Draw and label the following directional vectors. 30 degrees North of East 20 degrees West of South 10 degrees North of West 40 degrees East of North 25 degrees North of West Find the x and y... more
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Physics B Physics Physics C

02/07/21

A weight suspended from an ideal spring oscillates up and down. If the weight is increasing, the period is

A weight suspended from an ideal spring oscillates up and down. If the weight is increasing, the period is a) remaining the same (b) increasing (c) decreasing (d) 0 (e) none of these Explain your... more
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Physics B Physics Physics C

02/07/21

The stick is then set into motion. The period of the motion is __________
A meter stick is pinned at a point halfway between one end and the center of mass. The moment of inertia of this stick about its center is 1 2 cm 12 I mL = , where L is the length of the stick. The... more
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02/04/21

If you want to put a satellite into a geostationary orbit, meaning that it stays above the same position over the Earth at all times, at what altitude (above sea level) must you have it orbiting?
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02/02/21

AP Physics 1 Question involving KE and Momentum

An object has a kinetic energy of 277 J and a momentum of magnitude 28.4 kg · m/s.(a) Find the speed of the object.(b) Find the mass of the object.
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Physics B Physics

01/29/21

physics question help please

A 25 kg satellite orbiting a planet of an unknown mass in a circular path that has a radius of 2.0 ×106 m above the planet’s surface with a period of 8.5 h, the gravitational acceleration on the... more
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Physics B Physics

01/29/21

physics question

consider the following pairs of objects with varying masses and separation distances. which of these pairs has the smallest gravitational potential energy? (each "-" stands for 1 unit between r and... more
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